Coaster-brake.



J. J. TOBIN. C-OASTER BRAKE.

APPLICATION FlLED JULY 14, 1913.

1,157,064; Patented Oct. 19, 1915.

V mmmnnl Fl QM v M "1- filillllflyllllllllllllllllllllll z su 7 0 a a 3 -13 1) 10 part of this specification.

'f nnirnn snares mama ora ion.

JOHN J. TOBIN, OF CHICAGO, ILLINbIS, ASSIGNOR T TOBIH MANUFACTURING COMPANY, OF CHICAGO, ILLINOIS.

coAsrER-Bnnkn 1,157,064 v I Specification ofLetters Patent. Patented @Gia 19, 1&115

Application filed 1111 14, 1913. Serial No. ?78,972.'

To all whom it may concern. I in Figs. 2 and 3. Thus whenever the Be'it known that I, JOHN J. TOBIN, a citisprocket wheel 13 is rotated it rotates the Zen of the United States, residing at Chidriving element 12 and through the interpocago', in the county of Cook and State of sition of devices presently to be described Illinois, have invented a certain new and thereby drives the hub 8 provided the direc- 0 useful Improvement in Coaster-Brakes, of tion of rotation of the sprocket 1 3 is in the which the following is a full, clear, concise, right direction. The bearing portion 5 has and exact description, reference being had lugs 15, as shown more clearly in Figs. 1 to the accompanying drawings, forming a and 4, the purpose of which will presently appear. The pinion 13*, engages-upon its v 1y invention relates to coaster brakes and opposite sides with two racks 16 and 17 retransmission mechanism for vehicles, and is spectively forming parts of substantially more particularly adapted for usein connecsemi-cylindrical sleeves 18. and 19. These tion with bicycles or vehicles of a similar se ni-cylindrical sleeves l8-and l9 aredov-e- 5 nature. tailed together as shown .more clearly. in

In one form of my invention, which by the Figs. 3 and 5 by having the projections 20 way is the form disclosed herein, I utilize a I fitting corresponding sockets, phis to permit sprocket driven element for transmitting sliding motion of these two elements as more power to the wheel of a bicycle when said clearlyapparent'from Fig. 3. These semi- I sprocket driven element is rotating in one cyhndrical sleeves 18 and 19 are each pro 7 direction of rotation, .and which is so arvided with lugs 21 and 22 respectively ranged that when said sprocket driven eleadapted to cooperate with the lugs 15 and ment is rotated backwardly that a braking 15 as will presently appear. .force is exerted on said Wheel. Iwil'l, ex.- Now whenever the sprocket wheel is not 5 plain this form of my invention more parbeing driven and the'pa'rts are in normal 54.;

' ticularly in connection with the acoonipanyposition they occupy the particular positions ing drawing in which shown in Figs. '2 an respectively, and also- Figure 1 is a longitudinal sectional view Fig.1. Now if the sprocket Wheel13 how-- of myimproved structure; Figs. 2 and 3 are ever is driven in a clockwise direction (Fig.

sectional views on line aa of Fig. l illus- 3) then the driving element 12- is rotated in S5 trating the device in alternative positions; connection w th its pinion extension 13 to ig. 4 is a sectional view on line b-b of displace or separate the elements 18 and 19 Fig. 1, and Fig. 5 is aside view of parts of so that they occupy the position shownin he device. Fig. 3, whereupon these semi-cylindrical ele- 5 Referring more particularly tov Fig. l, I ments 18 and 19 frictionally engage the hub have a shaft 1 stationarily held between 8 to thereby drive the wheel. In this posiframe members 2 and 3 of the machine tion of the elements-18 and 19 the lugs 21 which in this case might be a bicycle. This and 22 have been movedoutwardly from the. shaft also carries bearings 4 and 5 fixedly shaft axisso that they clear the lugs 15 and secured to said shaft-to provide seats for the 15, the lugs 15 and 15 being stationarywith .95 sets of bearing balls respectively 6 and -7. the vehicle frame. Now should the'sprocket A Wheel hub 8 has a bearing section 9 ada t- 13 be rotated in a contra-clockwise direction ed to cooperate with the Sets of balls 7 at then the elements l8and 19 are slid over one extremity thereof and at its other exone another during thismovemenl, passing tremity cooperates with a further set 10 of through their'central position of Fig. 2 into balls which are seated in a bearing section the position in which theopposite sides of 11 of a rotatable driving element 12. This these semi-cylindrical elements engage the driving element 12 has fixedly secured thereinterior surface of the hub 8. In this p'osijon a sprocket 13 and is rotatably mounted tion of course the lugs 21 and 22 are carried through its association with the set of balls inwardly farther even. than shown in Fig.

6 previously referred to; This driving ele- 4, thereby preventing further backward ro--- :nent 12 has an extending sleeve l3 which tation of. the sprocket l3'and dr'iving ele;

surroundsthe shaft 1 and bears thereon, ment 12 after the semi-cylindrical elements which sleeve 13 is in the form of a pinion 18 and 19 have engaged the interior annular having the teeth 14 as shown more clearly surface of the hub,.8. Inthis position, the'llfl I elements 18 and v sprocket 13.

19 being prevented from r0- tation and engaging the hub 8, serve to exert a braking force on the hub 8 and consequently the wheel, which is proportional to the backward pressure exerted upon the It is of course obvious that in place of the wheel hub any other element acting in a similar way and fixedly secured to the wheel would be theequivalent in its uses to the use of the hub of the wheel as part of my struc-' ture herein, and in the claims in using'the words wheel hub it is to be construed of course as including such equivalent structure. i

From what has been described it is thought the nature of my invention will be clear and it will also be clear that the invention is susceptible of many modifications without departing from its spirit.

Having however thus described one form which my invention may take, what I claim as new and desire to secure by Letters Iatent is:

1. In a device of the character described the combination with a wheel hub, of a driving element, radially shifting means driven by said driving element interposed between said element and said hub to drive or brake said hub adapted to engage opposing portions of the inner periphery of said hub depending upon the direction of force exerted by said driving element, and stationarily mounted means adapted to cooperate with said radially shifting means when in one of its alternative, positions.

2. In a device of the character described,

the combination with a wheel hub, of a driving element, means driven thereby to engage opposing portions of the interior pee riphery of said hub depending upon the direction of force exerted-by said driving element' to thereby drive or brake said hub, and means cooperating with said first aforesaid means for braking purposes when in one of its alternative positions.

3. In a device of the character described the combination with a wheel hub, of a driving element, shifting means including a pair of relatively oppositely movable sections shiftable transversely of said hub interposed between said element and said hub adapted to occupy alternative hub engaging positions depending upon the'direction or force exerted by said driving element, and stationarily mounted means adapted to cooperate with said sectionsiwhen in one o't their alternative positions.

4. In a device of the character described the combination with a wheel hub, of a driving element, shifting, means including a pair of relatively oppositely movable sec tions interposed between said element and said hub adapted to occupy alternative positions depending upon the direction of force exerted by said driving elemenh and stationarily mounted means adapted to cooperate with said first aforesaid means when in one of its alternative positions said driving element including a pinion and said sec tions being provided with racks meshing with said pinion. I

5. In a device of the character described the combination with a wheel. hub, of a driving' element, shitting means including a pair of relatively oppositely movable sections in; terposed between said element and said hub adapted to occupy alternative positions depending upon the direction of force exerted by said driving element, and stationarlly mounted means adapted to coiiperate with said sections when in one of their alternative positions, said driving element inchiding the pinion, and said sections described the combination with a wheel hub, of a driving element. shifting means including a pair movable sections interposed between sai elements and said hub adapted to occupy alternative positions depending upon the direction of "force e1;- erted by said driving element, and stationarily mounted. means adapted to coiiperatc with said first aforesaid means when in one of its alternative positions, said driving element including a pinion and said sections being provided with racks meshing with said pinion. and said. sections having means to permit them to slide over each other butto prevent separation in a line at right angles to their relative movement.

'2'. In a device of the clmracter described the combination with a wheell'uil'). ot a driving element, shifting means int-hiding a pair of relatively oppositely movable sections in: terposed between said element and said huh adapted to occupy alternative positions deof relatively oppositely pending upon the direction of force exerted by said drlvlng element, and stationarily mounted means adapted to cooperate with said. sections when in one of their alteruative positions, said driving element including a pinion andsaid sections being prcvided with racks meshing with said pinion, and said sections having means to perm t them to slide-over each other but to prev separation ina line at right angles to tl relative movement.

8. In a device of the character descril the combination-with a wheel hub, oi: a (lliV' ing element, and means including a pair oi? relatively oppositely movable sections shilt able transversely of said hub adapted to occupy alternative positions depending upon iug'elenient, said means being interposed be- I tween said element and said hub to alternatively drive or brake said hub. 9. In device of the character described tel-native positions the combination with the combination with a wheel hub, of a driving element, and means shiftable transversely of said hub adapted to occupy aldepending upon the direction of force exerted by said driving element, said means being interposed between said element and said hub to alternatively drive or brake said hub, said element including a pinion and said sections being each provided with a rack meshing with said pinion.

10. In a device of the character described the combination with a Wheel hub, of a driving element, and means including a pair of relatively oppositely movable sections shiftable transversely ofv said hub adapted to cocupy alternative positions dependingupon the direction of force exerted by said driving element, said means being interposed between said element and said hub to alternatively drive or brake said hub, said'element including a pinion and said sections being each provided with a rack meshing.

with said pinion.

11. In a deviceof the character described the combination with a Wheel hub, of a driving element,- and means shiftable transversely of said native positions depending upon the direction of force exerted by said driving element, said means being interposed between said element and said hub to alternatively drive or brake said hub, said element includinga pinion and said sections being each provided with a rack meshing with said pinion, and said sections having means to per mit them to slide over each other but to prevent separation in a line at'right angles to their relative movement.

the character described a wheel hub, of a driving'element, and means including a pair 12. In a device of hub adapted to occupy alterof relatively oppositely movable sections shiftable transversely occupy alternative positions depending upon the direction of force exerted by said' driving element, said means being interposed between said element and said hub to alternatively drive or brake said hub, said element including a pinion and said sections being provided each with a rack meshing with said pinion, and said sections having means to permit them to slide over each other but to prevent separation in a line at right angles to their relative movement.

the combination With a Wheel hub, of adriving pinion, means including a rack cooperating With said pinion and driven thereby to engage different portions of the interior periphery of said hub depending upon the direction of force exerted by said pinion to thereby drive or brake said hub, and means cooperating for braking purposes with said first aforesaid means when in one of its al ternative positions.

14. In a device of the character described the combination with a Wheel hub having a cylindrical bearing surface, of a propelling element, means to shift said propelling element radially to engage said bearing surface when said propelling element is moved in a given direction to thereby drive said hub, and means cooperating with said propelling element when said propelling element is moved radially in the opposite direction to engage the same bearing surface to thereby brake said hub.

In witness whereof, I hereunto subscribe my name this 8th day of July, A. D. 1913.

JOHN J. TOBIN. Witnesses:

HAZEL ANN JONES, A. A. RADTKE.

of said hub adapted to 13. In a device of the character described 

